15.4. Multiple If’s with Images¶
We can use multiple if’s to reduce the number of colors in an image. Let’s say that if we have a little bit of each of red, green, and blue, we want to make each of them zero. If we have more, we set them to a mid-range value like 120. This is called posterizing because it reduces all the colors in a picture to a small number of colors – like the ones you might use if you were making a poster.
Rewrite the code for posterizing an image using if and else rather than multiple if’s. Test that it still works correctly.
Discuss topics in this section with classmates.